Almost perfect, there is a small thing to improve, the window's size, it's too small and I can't see the number of blur level

Does exactly what it says on the tin. I wish there was a functional add-on to blue arbibrary parts of the screen, but the one that would do seems to be busted.

As for THIS addon, I would recommend one new feature: The ability to use a hotkey anywhere on the page to toggle the blur on and off without having to open and then click the toggle. For an addon this simple, that's about all I think would be needed to make it perfect for it's intended use-case.

Doesn't work anymore with the new update
Edit: works again!

I need to adjust the blur amount. I can't figure out if it is safe to hover over an image because there is too much blur on it.

I can tell from the screen shots that it works properly on Chrome but doesn't apply the expected blur amount on Firefox (needs CSS fix?).

Excellent addon (using it for a while)!
But one thing stops me than putting 5 stars, which is a new bug that make the extension not to work sometimes unless you turn it off and on again.

Also, it could be nice to have an option to whitelist websites :)